Micrometer-caliper.



E. W. MARION. MIOROMETER GALIPER.

APPLIUATION FILED APR. 25, 1912.

51,098,.5 1 5, Patented June 2, 1914.

MM MW A TTOR/VEVS enrrnn srirrns rgrnnr OFFICE.

EDWARD WILLIAM MARION, 0F PHILADELPHIA, PENNSYLVANIA.

IVIICRUMETER-CALIPER.

To all whom it may concern Be it known that I, Enwimn N. Marlon, acitizen of the United States, and a resident of Philadelphia, in thecounty oi; Philadelphia and State of Pennsylvania, have invented a newand Improved Micrometer- Caliper, of which the following is a full,clear, and exact description,

This invention relates to micrometer :alipers, and has reference moreparticu-- larly to a device of this class, which conipriscs a pair oi?relatively adjustable heads provided with measuring points, and meansbetween. the heads for altering the normal lixed distance between them.

An object of the invention is to provide an inexpensive micrometercaliper, simple, rigid and durable in construction, with whichmeasurements from zero to any number and fractional part of standardunits, as machine practice may require, can be made by a simpleadjustment of the parts.

A further object of the invention is to provide a caliper of separableparts which can be clamped together so that in effect the device is ofunitary construction.

The invention consists in the construction and combination of parts tobe more fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompany ing drawing forming part of thisspecitication, in which similar characters of refer ence indicatecorresponding parts in all the views and in which Figure 1 is a sideelevation of my invention partly broken away and in section; Fig, 2 is aside elevation, partly in section, of a part of the caliper; Fig. 3 is atransverse section on the line El-3 of Fig. 2; and Fig. i is a plan viewof a part 01' the beam.

Before proceeding to a more detailed GX planation oi my invention, itshould be understood that the beam of the calipers is of cylindricalform, and may be integral with the fixed head or otherwise rigidlyassociated with the same; also that the sections by means of which thedistance between the two heads is altered may be placed on or in thebeam in any desired order, and the ad justable head may be provided withany known means to keep it in alinement with the fixed head on the beam.

It is useless to say that the micrometer and the ordinary measuringpoint may be Specification of Letters Patent.

Application filed April 25, 19152.

Patented June 2, 1914.

Serial No. 693,043.

interchanged withoutatl'ecting the operation of the device. It will alsoappear from the description that my invention does not require anyspecial adjustment while changing :troni one length to another.

Referring more particularly to the drawing, I provide a cylindrical beam15 with two diametrically opposite keyways 16, 1.6. The beam has areduced and tapered end 3, which at its extremity is provided withthread t. On the conical end 3 of the beam a head 6 is mounted andsecured in place by means of the nut 7, the head being provided at itsextremity with a measuringpoint 8 of suitable form. Removably positionedupon the beam is aplurality of sleeves 9 of different lengths, thecontacting surfaces of which are exactly ground and faced, and areperpendicular to the longitudinal axes of the sleeves. The sleeve at oneend of the series abuts directly against the head (3. Bearing againstthe other end sleeve and adjustably carried by the beam is snugly fittedthe head 10 which is provided with keys 11, received in the kcyways 16,16 of the beam to prevent its turning on the beam. The head 10 is alsoprovided at its extremity, and in alinenient with the measuring point 8,with a micrometer measuring point 12 for the measurement o'l. fractionalparts oi a unit length.

The beam keyways 16, 16 have laterally disposed notches 17 which arespaced apart any desired. lineal units for which the caliper isdesigned, thus permitting the clamping of the slidable head atditl'erent units of length. The clamping device consists of twothreaded, cylindrical parts 18 and 1.9, forming a. union snugly fittedon the beam. The teniale part 18 of the union is provided withprojections 20, 20 engaging in the keyways it), 16 of the beam andregistering with and. engaging the notches 17 where desired. It is thusunable to rotate on the beam except to a slight degree when theprojections 20 move into and out of the notches 17, and forms anabutment for the male part 19 of the union while clamping the head 10;the male part 19 is free to turn on the beam.

\Vhen changing from a twelve inch caliper to a length between one andtwo inches, the sleeves of two, three and five inches are entirelyremoved from the beam in the following way: lhe male part 19 of theunion screwed into the part 18, thus relieving the pressure on theprojections 20, 20 and peri mitt-mg a slight turn of the temale part 18,i

and by so doing the projections 20, 20 engage the keyways 16, 16, andthe union is then removed, the washer 22, head 10 and sleeves of five,three and two inches follow ing, the inch sleeve remaining on the beamagainst the fixed head. Then the head 10, washer 22 and the union ismounted again on the beam in order as described, and all is clamped bysimply engaging in the proper notches the projections 20, 20 of the part18 and unscrewing the part 19 hearing against the washer 22.

It can be easily seen that by proper combination of the four sleeves ofone, two, three and five inches, any measurement between Zero and twelveinches may be made, the measuring points of the heads 6 and 10 being oneinch apart when their lower tubular portions are in engagement, with allof the sleeves removed. The sleeves themselves may be verified on thedevice described for exactness of their lengths.

Having thus described my invention. I claim as new, and desire to secureby Letters Patent 1. The combination as describedcomprising a beam, twoheads provided with measuring points, means between said heads foradjustably spacing them apart, a clamping device on said beam consistingof engaging threaded parts, and means associated with said clampingdevice and said beam to hold all parts of the caliper in unitaryrelation at a desired point on said beam.

2. The combination as described, comprising a beam, two heads on thebeam, one of which is adjustable, means between said heads foradjustably spacing them apart, a two-part clamping device for theadjustable head, the parts of which are threadedly engageable, andcooperating means carried by one of said clamp parts and said beamwhereby the former may be locked against longitudinal movement withrespect to the latter, at a plurality of points thereon.

2-3. The combination as described, compris ing a beam, having oppositelongitudinal slots, two heads on the beam, one of which has membersextending into the beam slots whereby to prevent its rotation withrespect to the beam, and at the same time permit of its longitudinaladjustment, independently removable spacing rings disposed on the beambetween the said heads, a clamping device on the beam for the saidadjustable head and comprising two members threadedly coupled to oneanother, one of said members being provided with inwardly eX- tendingprojections movable in the said beam slots, and said beam being alsoprovided with a plurality of notches alongside its slots, into selectedones of which the said projections may be moved whereby to lock one ofthe clamped members against movement.

4. The combination of a beam, a fixed head and a slidable head on thebeam, measuring points on the said heads. a plurality of tubularsections of different lengths movably mounted on the beam between thesaid heads and in close contact with each other and with the headswhereby to vary the distance between the said heads, a member adapted tofollow the movable head on the beam and having means whereby toadjustably engage the latter at a plurality of points therealon and amember abutting said first named member and adjustable between thelatter and the said slidable head to clamp the head against one of thetubular sections.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDWVARD lVILLIAM MARION. lVitnesses C. W. REED,

R. H. PRICHARD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 0! Patents, Washington, D. C.

